Secondary battery

Abstract

The secondary battery includes an electrode assembly including a first electrode plate, a second electrode plate and a separator interposed between the first electrode plate and the second electrode plate, a case accommodating the electrode assembly, and a first current collector plate electrically connected to the first electrode plate and having a first fuse part formed at its one side, wherein the first fuse part includes at least two fuse holes spaced apart from each other.

What is claimed is: 
     
       1. A secondary battery, comprising:
 an electrode assembly including a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate; 
 a case accommodating the electrode assembly; and 
 a first current collector plate electrically connected to the first electrode plate and having a first fuse part at a first side of the electrode assembly, 
 wherein 
 the first fuse part includes:
 first and third fuse holes adjacent the corner, and 
 second and fourth fuse holes spaced apart from the first and third fuse holes, and farther from the corner than the first and third fuse holes. 
 
 
     
     
       2. The secondary battery as claimed in  claim 1 , wherein the first current collector plate includes:
 a first connection part connected to the first electrode plate at the first side of the electrode assembly; and 
 a first extension part bent and extended from the first connection part and extending between to be located at an upper portion of the electrode assembly and the case, 
 wherein a corner is formed at a portion where the first connection part and the first extension part meet. 
 
     
     
       3. The secondary battery as claimed in  claim 2 , wherein the first fuse part is in the first extension part. 
     
     
       4. The secondary battery as claimed in  claim 3 , wherein the first fuse hole and the second fuse hole are a same size. 
     
     
       5. The secondary battery as claimed in  claim 3 , wherein the first fuse hole and the second fuse hole each have a width in a range of about 0.5 to about 2.0 mm. 
     
     
       6. The secondary battery as claimed in  claim 3 , wherein a distance between the first fuse hole and the second fuse hole is two to four times of a width of the first fuse hole or the second fuse hole. 
     
     
       7. The secondary battery as claimed in  claim 3 , further comprising a first terminal hole in the first current collector plate to be engaged with a first electrode terminal, the second fuse hole being between the first fuse hole and the first terminal hole. 
     
     
       8. The secondary battery as claimed in  claim 3 , wherein:
 the first and third fuse holes are equally spaced apart from the corner, and 
 the second and fourth fuse holes are equally spaced apart from the first and third fuse holes. 
 
     
     
       9. The secondary battery as claimed in  claim 3 , further comprising a first terminal hole in the first current collector plate to be engaged with a first electrode terminal, the second and fourth fuse holes being between each of the first and third fuse holes and the first terminal hole. 
     
     
       10. The secondary battery as claimed in  claim 2 , wherein the first fuse part is in the first connection part. 
     
     
       11. The secondary battery as claimed in  claim 10 , wherein the first fuse hole and the second fuse hole are a same size. 
     
     
       12. The secondary battery as claimed in  claim 10 , wherein the first fuse hole and the second fuse hole each have a width in a range of about 0.5 to about 2.0 mm. 
     
     
       13. The secondary battery as claimed in  claim 10 , wherein a distance between the first fuse hole and the second fuse hole is two to four times of a width of the first fuse hole or the second fuse hole. 
     
     
       14. The secondary battery as claimed in  claim 10 , wherein:
 the first and third fuse holes are equally spaced apart from the corner, and 
 the second and fourth fuse holes are equally spaced apart from the first and third fuse holes.